47   PetscReal fmin, ftrial, f_full, prered, actred, kappa, sigma;  in TaoSolve_NLS()  local
155             PetscCall(VecDot(tao->gradient, nlsP->D, &prered));  in TaoSolve_NLS()
157             prered = tao->trust * (gnorm - 0.5 * tao->trust * prered / (gnorm * gnorm));  in TaoSolve_NLS()
159 …      if ((PetscAbsScalar(actred) <= nlsP->epsilon) && (PetscAbsScalar(prered) <= nlsP->epsilon)) {  in TaoSolve_NLS()
162               kappa = actred / prered;  in TaoSolve_NLS()
165 …norm * tao->trust / (nlsP->theta_i * gnorm * tao->trust + (1.0 - nlsP->theta_i) * prered - actred);  in TaoSolve_NLS()
166 …norm * tao->trust / (nlsP->theta_i * gnorm * tao->trust - (1.0 + nlsP->theta_i) * prered + actred);  in TaoSolve_NLS()
563           PetscCall(KSPCGGetObjFcn(tao->ksp, &prered));  in TaoSolve_NLS()
564           if (prered >= 0.0) {  in TaoSolve_NLS()
575               prered = -prered;  in TaoSolve_NLS()
576 …      if ((PetscAbsScalar(actred) <= nlsP->epsilon) && (PetscAbsScalar(prered) <= nlsP->epsilon)) {  in TaoSolve_NLS()
579                 kappa = actred / prered;  in TaoSolve_NLS()
613           PetscCall(KSPCGGetObjFcn(tao->ksp, &prered));  in TaoSolve_NLS()
614           if (prered >= 0.0) {  in TaoSolve_NLS()
624               prered = -prered;  in TaoSolve_NLS()
625 …      if ((PetscAbsScalar(actred) <= nlsP->epsilon) && (PetscAbsScalar(prered) <= nlsP->epsilon)) {  in TaoSolve_NLS()
628                 kappa = actred / prered;  in TaoSolve_NLS()
631 …         tau_1   = nlsP->theta * gdx / (nlsP->theta * gdx - (1.0 - nlsP->theta) * prered + actred);  in TaoSolve_NLS()
632 …         tau_2   = nlsP->theta * gdx / (nlsP->theta * gdx + (1.0 + nlsP->theta) * prered - actred);  in TaoSolve_NLS()